<template>
  <HomePanel ref="target" title="热门品牌" sub-title="国际经典 品质保证">
    <template v-slot:right>
      <a @click="index = 0" :class='{disabled: index===0}' href="javascript:;" class="iconfont icon-angle-left prev">⬅️</a>
      <a @click="index = 1" :class='{disabled: index===1}' href="javascript:;" class="iconfont icon-angle-right next">➡️</a>
    </template>
    <div class="box" ref="box">
      <ul class="list" :style="{'transform': `translateX(${-index*1240}px)`}" >
        <li v-for="i in result" :key="i.id">
          <RouterLink to="/">
            <img :src="i.picture" alt="">
          </RouterLink>
        </li>
      </ul>
    </div>
  </HomePanel>
</template>

<script>
import HomePanel from './home-pannel'
import { useLazyData } from './index'
import { findBrand } from '@/api/home.js'
import { computed, ref } from 'vue-demi'
export default {
  name: 'HomeBrand',
  components: { HomePanel },
  setup () {
    const { target, result } = useLazyData(() => findBrand(10))
    console.log(result.value)
    const index = ref(0)
    const list = computed(() => {
      if (result.value) { // 严谨
        return result.value.filter((item, ind) => {
          if (index.value === 0) {
            return ind < 5
          } else {
            return ind >= 5
          }
        })
      }
    })
    return { target, index, list, result }
  }
}
</script>

<style scoped lang='less'>
.home-panel {
  background:#f5f5f5
}
.iconfont {
  width: 20px;
  height: 20px;
  background: #ccc;
  color: #fff;
  display: inline-block;
  text-align: center;
  margin-left: 5px;
  background: @xtxColor;
  &::before {
    font-size: 12px;
    position: relative;
    top: -2px
  }
  &.disabled {
    background: #ccc;
    cursor: not-allowed;
  }
}
.box {
  display: flex;
  width: 100%;
  height: 345px;
  overflow: hidden;
  padding-bottom: 40px;
  .list {
    width: 200%;
    display: flex;
    transition: all 1s;
    li {
      margin-right: 10px;
      width: 240px;
      &:nth-child(5n) {
        margin-right: 0;
      }
      img {
        width: 240px;
        height: 305px;
      }
    }
  }
}
</style>
